Nope. No Elvis cartoon was ever made. As for cartoons based on real life celebrities that didn’t have the celebrity solely as a live-action host a la Fat Albert, in addition to the one’s named above, I can think of…
When I was a kid, back in the 60s, there were Laurel & Hardy and Abbot & Costello cartoon shows on tv. The former was produced by Larry “Bozo” Harmon, who was the voice of Stan Laurel, and the latter had Bud Abbott voicing himself.
That’s not entirely fair. Bill Cosby shot the live-action “bumper” segments of Fat Albert and the Cosby Kids, but he also appeared in the cartoon - one of the kids was named “Bill” and had a younger brother named “Russell”. Cosby provided the voice for “Bill” (and Albert, and several others).
Bill Cosby really does have a brother named Russell and in that sense, the cartoon was semi-autobiographical of Bill Cosby’s childhood in Philadelphia. Cosby even has a comedy routine about growing up with Fat Albert and was using it before the cartoon series started - Albert was the secret weapon in their “buck-buck” competitions.
The series is actually typical of Cosby’s comedy routines. He’s never really the center of any of his anecdotes; they’re usually about his relatives and friends and other whacky characters. when he is the center of the comedy, he actually gets kind of insufferable, since he resorts to endless mugging.